<!--
 * @Descripttion: 
 * @Author: voanit
 * @Date: 2022-06-08 18:23:32
 * @LastEditors: voanit
 * @LastEditTime: 2022-06-08 18:28:28
-->
<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <script>
    let str = 'React hello  React'
    let reg = new RegExp('react', 'gi')
    var newStr = str.replace(reg, (res) => {

      return `<span>${res}</span>`
    })
    console.log(newStr, 88);
  </script>
</body>

</html>